| Subject: Re: T500 Lighting circuit - How many Amps? |
Author:
brian henry
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Date Posted: 20/02/06 20:40:44
In reply to:
Neil
's message, "T500 Lighting circuit - How many Amps?" on 20/02/06 13:14:42
If you have circuit breakers then you will not have fuses, if an overload occurs the circuit breaker will trip instead of blowing a fuse, you just need to reset the circuit breaker.
Yes, you can use a multimeter to read the voltage across the connectors. This will be the logical first step to check if power is there. But measuring your voltage has nothing to do with ampere ratings, a meter set on voltage measurement has a high resistance shunt so there will be no problem. Set the multimeter to DC volts and at a range where full scale deflection is well above your battery voltage, say 12volts if standard, and put the probes on the input wires to check if there is a battery connection. Preferably you will have bought a digital multimeter so that polarity is not an issue or if not, first put the range high to not drive the needle too hard negative if the probes are reversed.
To measure current, the multimeter must be set on “Amps” and the positive probe normally set to a separate socket on the meter. Because current can only be measured in series, that is the current actually does flow through the meter, most domestic meters are limited to about 10 amps. If you suspect a short circuit because the circuit breaker is tripping, you should not put your meter in series to the flow because of the 10 Amp limitation, find the short circuit by disconnecting the battery and check by using your meter on Ohms resistance for where the short circuit may be occurring.
Most of us Trapper 500 owners have had to rewire the entire ship, I certainly did. If you haven’t yet done so, I think you should consider it, although if you have circuit breakers instead of the original toy switch panel with fuses over the chart table, then it probably has already been done.
Good luck.
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